<?php
// 设定你要清除BOM的根目录（会自动扫描所有子目录和文件）
$HOME = dirname(__FILE__);
// 如果是Windows系统，修改为：$WIN = 1;
$WIN = 0;
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>UTF8 BOM 清除器</title>
    <style>
        body {
            font-size: 10px;
            font-family: Arial, Helvetica, sans-serif;
            background: #FFF;
            color: #000;
        }

        .FOUND {
            color: #F30;
            font-size: 14px;
            font-weight: bold;
        }
    </style>
</head>
<body>
<?php
$BOMBED = array();
RecursiveFolder($HOME);
echo '<h2>These files had UTF8 BOM, but i cleaned them:</h2><p class="FOUND">';
foreach ($BOMBED as $utf) {
    echo $utf . "<br />\n";
}
echo '</p>';
// 递归扫描
function RecursiveFolder($sHOME)
{
    global $BOMBED, $WIN;
    $win32 = ($WIN == 1) ? "\\" : "/";
    $folder = dir($sHOME);
    $foundfolders = array();
    while ($file = $folder->read()) {
        if ($file != "." and $file != "..") {
            if (filetype($sHOME . $win32 . $file) == "dir") {
                $foundfolders[count($foundfolders)] = $sHOME . $win32 . $file;
            } else {
                $content = file_get_contents($sHOME . $win32 . $file);
                $BOM = SearchBOM($content);
                if ($BOM) {
                    $BOMBED[count($BOMBED)] = $sHOME . $win32 . $file;
                    // 移出BOM信息
                    $content = substr($content, 3);
                    // 写回到原始文件
                    file_put_contents($sHOME . $win32 . $file, $content);
                }
            }
        }
    }
    $folder->close();
    if (count($foundfolders) > 0) {
        foreach ($foundfolders as $folder) {
//            RecursiveFolder($folder, $win32);
            RecursiveFolder($folder);
        }
    }
}

// 搜索当前文件是否有BOM
function SearchBOM($string)
{
    if (substr($string, 0, 3) == pack("CCC", 0xef, 0xbb, 0xbf)) return true;
    return false;
}

?>
</body>
</html>